hearts-not a reply to the recent drama I have seen :)

Good evening ladies!!Im not sure if I am asking this in the right place, but this is where I do the most interacting so I will ask it here

I've been seeing all these post on "hearts" and I know what they are, how to give, etc. What I don't get is the levels. I couldn't find a thread on it, but I was wondering the levels and X amounts of hearts bumps you up. I am not being a smart elic, just a honest question I have been wondering